Following a two-week stretch that saw U.S. Senate candidate Ken Buck entangled in not one but two comment controversies, the new Rasmussen Reports poll shows little change in Buck’s overall numbers in head-to-head matchups against either appointed Sen. Michael Bennet or his Democratic opponent Andrew Romanoff.

In the poll, conducted on July 26, Buck leads both Bennet and Romanoff by an identical 48-42 margin. Former Lt. Governor Jane Norton’s numbers against the Democratic candidates also reflects little change from the previous poll, indicating no bounce for Buck’s primary opponent.

It began with the infamous (and viral) “high heels” response directed at Norton’s “man enough” attack ad. Then there was the subsequent revelation of an earlier remark made by Buck to a Democratic operative at a campaign event in June and caught on a hidden recording device where the candidate referred to “dumb****s at the Tea Party” interested in the provenance of President Barack Obama’s birth certificate. Buck appears to have weathered not only fierce criticism from Norton in both instances, and the controversy has done little to disrupt the affinity with Buck felt by many members of Colorado’s grassroots Tea Party and 9/12 organizations.

In the heat of a furiously contested GOP primary battle, however, Norton has also been under attack–not for offhanded comments made on the campaign trail, but for her record on the issues and, in particular, what many see as Norton’s Achilles heel: Referendum C, a ballot initiative passed in 2005 that put a “hold” on the Taxpayer Bill of Rights (TABOR). Critics argued before the measure even passed that the initiative was tantamount to an actual tax increase.

Americans for Job Security has poured millions into the GOP primary battle attacking Norton. The most recent ad entitled “Talk is Cheap” features the Colorado Republican compared to President Obama and Sen. Bennet—“Liberal politicians will say anything, but talk is cheap”: